Colin Kapernick spent Saturday morning of the at the Indigenous People’s Sunrise Ceremony on the 50 year anniversary of the Occupation of Alcatraz. Known also as an “Unthanksgiving” event.

Spent the morning at the Indigenous People’s Sunrise Ceremony on the 50 year anniversary of the Occupation of Alcatraz. The US government has stolen over 1.5 billion acres of land from Indigenous people. Thank you to my Indigenous family, I’m with you today and always.?? pic.twitter.com/6cTuktUlQN

Former NFL player Colin Kaepernick had an odd way of celebrating Thanksgiving, attending an event that appeared to serve as a rebuke to the holiday and the United States.

On Thursday, Kaepernick spoke at the “Indigenous People’s Sunrise Ceremony,” also known as “Unthanksgiving,” on Alcatraz Island in San Francisco, California. The event is intended to celebrate the 50th anniversary of Native Americans occupying the famous island, which previously served as the site of a federal prison.

“Spent the morning at the Indigenous People’s Sunrise Ceremony on the 50 year anniversary of the Occupation of Alcatraz,” Kaepernick tweeted on Thanksgiving day.

“The US government has stolen over 1.5 billion acres of land from Indigenous people. Thank you to my Indigenous family, I’m with you today and always.”

Kaepernick is no stranger to controversy and has been out of the NFL since the 2016 season. He started a national firestorm when he decided to kneel during the national anthem before games to raise awareness about perceived social injustices across the U.S. He accused NFL owners in a grievance of blackballing him from the league because of the anthem protest, but the two sides settled earlier this year.

He tweeted a video of a man proclaiming that Native Americans were taking the land by “right of discovery.” The video also appeared to show him speaking to celebrants on the island.

He also spoke at this event back in 2017:

Today, I was on Alcatraz Island at the Indigenous People’s Sunrise Gathering, in solidarity with those celebrating their culture and paying respects to those that participated in the 19 month occupation of Alcatraz in an effort to force ?? to honor the Treaty of Fort Laramie. pic.twitter.com/KdNtY3dp72